package com.uraurora.crescent.function;

import com.google.common.cache.Cache;
import com.uraurora.crescent.function.functools.memoizer.MemoizerFunc4;
import com.uraurora.crescent.tuple.ITuple;

import java.util.Objects;
import java.util.concurrent.Future;

@FunctionalInterface
public interface Func4<T1, T2, T3, T4, RT> {

    RT on(T1 t1, T2 t2, T3 t3, T4 t4);

    default <V> Func4<T1, T2, T3, T4, V> after(Func1<? super RT, ? extends V> after) {
        Objects.requireNonNull(after);
        return (T1 t1, T2 t2, T3 t3, T4 t4) -> after.on(on(t1, t2, t3, t4));
    }

    //<editor-fold desc="柯里化和反柯里化">
    default Func3<T2, T3, T4, RT> curry1(T1 t1){
        return (t2, t3, t4) -> on(t1, t2, t3, t4);
    }

    default Func3<T1, T3, T4, RT> curry2(T2 t2){
        return (t1, t3, t4) -> on(t1, t2, t3, t4);
    }

    default Func3<T1, T2, T4, RT> curry3(T3 t3){
        return (t1, t2, t4) -> on(t1, t2, t3, t4);
    }

    default Func3<T1, T2, T3, RT> curry4(T4 t4){
        return (t1, t2, t3) -> on(t1, t2, t3, t4);
    }



    default Func2<T3, T4, RT> curry(T1 t1, T2 t2){
        return (t3, t4) -> on(t1, t2, t3, t4);
    }

    default Func1<T4, RT> curry(T1 t1, T2 t2, T3 t3){
        return t4 -> on(t1, t2, t3, t4);
    }
    //</editor-fold>

    //<editor-fold desc="记忆化">
    default MemoizerFunc4<T1, T2, T3, T4, RT> memoize(){
        return new MemoizerFunc4<>(this);
    }

    default MemoizerFunc4<T1, T2, T3, T4, RT> memoize(Cache<ITuple, Future<RT>> cache){
        return new MemoizerFunc4<>(this, cache);
    }
    //</editor-fold>
}
